Define each of the following terms:
Descriptive research strategy
Linear relationship
Curvilinear relationship
Positive relationship
Negative relationship
Correlational research strategy
Experimental research strategy
Quasi-experimental research strategy
Nonexperimental research strategy
Selection bias
Volunteer bias
Novelty effect
Multiple treatment interference
Sensitization, or assessment sensitization, or pretest
Sensitization
Participant variables
Time-related variables
Fatigue
Practice
Artifact
Experimenter bias
Single-blind
Double-blind
Demand characteristics
Reactivity
Laboratory
Field